Reiser is the Hebrew voice of Robert Hardy in the Harry Potter films and Vincent Grass as Dr. Cornelius in The Chronicles of Narnia: Prince Caspian. His animation voice credits include dubbing various American, Japanese, and French series, including OxTales, Babar (Rataxes), Alfred Joducus Kwak, DragonBall Z, Winnie the Pooh (as Rabbit) Care Bears (as Bravheart Lion, Professor Coldheart and others), The Little Mermaid, and Once Upon a Time... Life. He appeared on-camera in the Steven Spielberg film Munich.